DEVICE FOR DISPLAYING IMAGE BY PROJECTION, COMPRISING DICHROIC FILTER WITH GRADIENT

摘要

PROBLEM TO BE SOLVED: To provide a device which includes dichroic filters with a gradient and has color performance substantially improved and is for displaying an image by projection. SOLUTION: Provided is the device comprising: matrices of reflecting elements which can be electrically driven, and means for deconstructing a beam of polychromatic light and means for reconstructing complementary reflected beams, comprising two dichroic filters (21, 22; 21', 22') with a gradient where, for at least one of these filters, the direction of the gradient HOG, H'OG' makes an angle of inclination of non-zero gradientδ,δ' with a plane (DOE, D'OE') orthogonal to the reflecting surfaces of the matrices. COPYRIGHT: (C)2003,JPO